In chemistry, condensed phases are both liquid and solid state. Gas and condensed phases are different in many parameters. Papers on chemical reactions in solid and liquid phases are collected in this volume, homogeneous and heterogeneous processes are discussed. Special attention paid to effects of metals and their oxides on the tribological characteristics of the composites, behaviour of polyurethanes in biological media, behaviour of some solid oxides irradiated in different media, nanotechnology in polymer coatings, structural peculiarities of polymers and co-polymers, radical polymerisation and co-polymerisation PMR and NMR structural characteristics of different compounds, synthesis of new polyfunctional polymers, synthesis and investigation of properties of natural and synthetic polymers and co-polymers, polymer coatings and films, investigation of oligosulfons properties, macrokinetic mechanism of biodegradation of polymers, polyazomethine-esters based on a new aromatic dialdehydes, the influence of polyazomethines on physicomechanical properties of polymers, the possibility of use of embolising preparates for chemoemobolisation, some important parameters for control of proteolytic reaction on wool, kinetics and mechanism enzymatic degradation of chitosan, polymers as natural nanocomposites (the geometry of intercomponent interactions, the comparative analysis of reinforcement mechanisms, thermophysical properties, the stress concentration and strength, molecular mobility level in polymers, elasticity modulus and polymer chains tightness), biomimetic oxidation, biocide and toxicological characteristics, synthesis and study of phenol-formaldehyde type of polymers, modern basalt fibrous materials and basalt fibre based polymeric composites, etc. Papers on degradation of polymers and recycling of polymers are presented in this volume as well. We would like to remind that processing of waste products is very important, but for example in Russia only 1.5% of waste products is being processed, in Germany – 60%, in Denmark and Switzerland – 80%, in Japan – 85-88%. Ideally, 100% of waste products should be used again after processing.